Sources of Fiber
Characteristics of Fiber
Hair Structure
Whose hair is it anyway?
Hair and Fiber as Evidence
100
Cotton comes from this.
What is a cotton plant?
100
This type of natural fiber is strong and durable.
What is linen?
100
Melanin granules in the cortex give the hair this quality.
What is its color?
100
This part of the hair can be analyzed for DNA.
What is the root?
100
According to the FBI, this is the smallest indivisible unit of a textile.
What is a fiber?
200
Silk comes from this animal.
What is a caterpillar or worm?
200
These are the two most common synthetic fibers.
What are polyester and nylon?
200
The hair shaft is composed of these three parts.
What are the cuticle, cortex, and medulla?
200
True or false: Only a crack cocaine use would have a  hair analysis showing chemicals found in crack cocaine. 
False
200
Less common fibers at a crime scene would have (increased or decreased) significance?
What is increased?
300
This is a manufactured inorganic fiber.
What is fiberglass?
300
This natural fiber is known for being fire-resistant.
What is asbestos?
300
This is the outer layer of the hair follicle.
What is the cuticle?
300
Only 2 percent of this mammal's hair is on its head.
What is human?
300
The hair shaft is this kind of evidence.
What is class evidence?
400
Name one of the natural fibers that comes from goats.
What is mohair or cashmere?
400
A fiber's length is many times its _______________.
What is diameter?
400
This is the period of active hair growth.
What is the anagen stage?
400

Those with straight hair typically have hair whose cross section is this shape.

What is round (or circular)?
400
This type of transfer occurs between victim and suspect.
What is direct transfer?
500
This fabric comes from rabbits.
What is angora?
500
Fibers are made of these smaller units.
What are filaments?
500
This is a skin organ that produces hair.
What is the follicle?
500
The specific product of a substance, formed by the body's chemical processes, that can show up in the hair.
What are metabolites?
500
In Forensic Files, this is the name of the shape of the fibers' cross sections, which made the fibers unique and gave them increased significance.
What is trilobal?
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